Insulated Colorbond Roofing, Metal Roofing Sheets — Stramit Speed Deck Ultra Ascent


  • Wide Cover fewer sheets and quicker installation.
  • Deep Ribs stronger and stiffer with better water carrying capacity; roof slopes as low as 1°.
  • Full Length Clips to locate ribs and compress insulation.
  • Four Fixing Points Per Clip with centralised fastening for unsurpassed strength.
  • Hexagon Head Screws bigger, stronger and easier to install, with less wastage.
  • Outstanding Wind Load Resistance improved security with lower purlin costs.
  • Spring Curving data for arched and curved roofs.
  • Automatic Bird Proofing built in accessory with no need for extra components.
  • Independently Tested by James Cook University Cyclone Testing Station for cyclonic performance one set of load tables for use anywhere in Australia.


Stramit Speed Deck Ultra® decking, winner of a 1995 Australian Design Award for “using the properties of high tensile steel to their best advantage through good design practices”.


he visual appeal, strength, wide cover, light weight and weather resistance of Stramit Speed Deck Ultra® decking make it perfect for all commercial roofing applications. Its excellent strength and ease of assembly allow for long, economical spans.The large water-carrying capacity and weather-tightness permit very low roof pitches, leading to economies in the building structure. Stramit Speed Deck Ultra® decking may also be used for domestic applications.


Stramit Speed Deck Ultra® decking is manufactured from hi-tensile G550 colour coated steel or zinc-aluminium alloy coated steel. In some locations galvanised and severe environmental colour coated steel may be available by arrangement. Colour coated steels are in accordance with AS2728 – Category 3 and, for the substrate, with AS1397. Zinc-aluminium alloy coated AZ150 and galvanised Z450 conform to AS1397. Stramit has a comprehensive range of colours as standard. Ask your nearest Stramit location for colour availability.



The suitability and exposure tables above are guidelines only; conditions will vary from site to site. If in any doubt about the choice of coating for a particular application contact your nearest Stramit office for advice.


All building products need to be checked for compatibility with adjacent materials. These checks need to be for both direct contact between materials, and where water runs from one material to another. The following guidelines generally avoid material incompatibility:

For Zincalume, Colorbond XRW and galvanised roofs avoid copper, lead, green or treated timber, stainless steel and mortar or concrete.

In addition galvanised roofs should not receive drainage from aluminium or any inert materials, such as plastics, glass, glazed tiles, Colorbond and Zincalume.


Stramit has in-house, purpose built, testing equipment used to design, develop and improve products for the Australian market. In addition many Stramit products are tested or witnessed by independent organisations.

These include:

  • Cyclone Structural Testing Station

(James Cook University)

  • The University of Sydney
  • Monash University
  • University of Queensland
  • University of Technology, Sydney
  • This ongoing research and development activity ensures that Stramit remains at the forefront of innovation, design and consumer information.


    The roofing/walling shall be 0.42 (0.48 or 0.60) mm BMT Stramit Speed Deck® 500 decking, in continuous lengths with trapezoidal ribs 41mm high, spaced at 250mm centres. Sheeting material shall be protected steel sheet to AS1397 with a minimum yield stress of 550MPa (Grade G550) and an AZ150 zinc-aluminium coating with or without an oven baked paint film of selected colour.The sheeting shall be fixed to the purlins/girts in accordance with the manufacturers recommendations. Suitable fixing screws in accordance with Australian Standard AS3566, Class 3, shall be used at every rib at every support. Sheets shall be laid in such a manner that the approved side lap faces away from the prevailing weather. A minimum of 50mm shall be provided for projection into gutters. Flashings shall be supplied in compatible materials as specified, minimum cover of flashing shall be 150mm. All sheeting shall be fixed in a workman like manner, leaving the job clean and weathertight. Repair minor blemishes with touch-up paint supplied by the sheeting manufacturer. All debris (nuts, screws, cuttings, filings etc.) shall be cleaned off daily.

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